CN100482809C - Method of molten iron desulfuring using magnesium in metal mixer and equipment for realizing said method - Google Patents
Method of molten iron desulfuring using magnesium in metal mixer and equipment for realizing said method Download PDFInfo
- Publication number
- CN100482809C CN100482809C CNB2005100467594A CN200510046759A CN100482809C CN 100482809 C CN100482809 C CN 100482809C CN B2005100467594 A CNB2005100467594 A CN B2005100467594A CN 200510046759 A CN200510046759 A CN 200510046759A CN 100482809 C CN100482809 C CN 100482809C
- Authority
- CN
- China
- Prior art keywords
- hot metal
- molten iron
- metal mixer
- slag
- magnesium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 190
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 36
- 229910052751 metal Inorganic materials 0.000 title claims description 94
- 239000002184 metal Substances 0.000 title claims description 94
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims description 44
- 229910052749 magnesium Inorganic materials 0.000 title claims description 42
- 239000011777 magnesium Substances 0.000 title claims description 42
- 239000007921 spray Substances 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- 239000002893 slag Substances 0.000 claims description 41
- 238000006477 desulfuration reaction Methods 0.000 claims description 21
- 230000023556 desulfurization Effects 0.000 claims description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 18
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 15
- 239000005864 Sulphur Substances 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims 2
- 230000003009 desulfurizing effect Effects 0.000 abstract description 17
- 230000001590 oxidative effect Effects 0.000 abstract description 5
- 230000002829 reductive effect Effects 0.000 abstract description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 5
- 238000009628 steelmaking Methods 0.000 description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 4
- 235000011941 Tilia x europaea Nutrition 0.000 description 4
- 239000004571 lime Substances 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 235000003599 food sweetener Nutrition 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000003765 sweetening agent Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000012159 carrier gas Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
Images
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
A method and apparatus for using Mg to desulfurize the molten iron in mixer furnace features that said mixer furnace can be tilted to a desulfurizing position. When it is at a normal position, its lateral nozzle can spray the non-oxidizing gas in the furnace. When it is tilted to a desulfurizing position, said lateral is immersed in molten iron and can spray desulfurizing agent into molten iron while the N2 or the reductive gas is sprayed in the furnace by the blower.
Description
Technical field:
The present invention relates to carry out the method for desulfurizing iron and realize the equipment that this method is used with containing magnesium preparation, exactly is the equipment of method with this method of realization of molten iron desulfuring using magnesium in metal mixer.
Background technology:
In the device (No. 3880411, Chinese patent 9223935.4 and United States Patent (USP)) of the known method (No. 3880411, United States Patent (USP)) of handling molten iron with magnesium and this method of realization, loose magnesium material is the refractory lance (the exit end band vaporizer of spray gun) by lining, slips into molten iron from top to down and is blown in the hot metal ladle by means of carrier gas jet.
Existing experience shows that under actual Iron and Steel Production condition, known certain methods and equipment are not reasonably to handle molten iron.When iron water amount is insufficient in the hot metal ladle, when lacking freeboard (being unkitted the space of molten iron) in the hot metal ladle, when the insufficient height of workshop, when the needed various platform of the sweetener that does not possess mounting strap submerged type spray gun, when requiring when the hot metal ladle that molten iron is housed is frequently transported in the workshop and also having some other reason, all can't reasonably handle molten iron with known method and apparatus.
Simultaneously, in many Steel Plant, all adopt fixed hot metal mixer operation, from hot metal mixer, molten iron poured into and send into the steelmaking equipment unit in the converter hot metal ladle again.Generally speaking, weight of molten iron is no less than 300t in the hot metal mixer, and there are enough freeboards the melt top.Up to now, fail to be implemented in the operation of handling molten iron in these hot metal mixer, wherein just comprise the desulfurizing iron operation.
Once there were some to adopt known method and apparatus in fixed hot metal mixer, to carry out the trial of desulfurizing iron, but all failed to obtain good result, under the major cause:
1, the hot metal mixer diameter is too big, and the freeboard height between hot metal mixer and the electronic bridge overhead travelling crane is little simultaneously, thereby does not allow to adopt upper plug type to slip into the method and apparatus that molten iron is handled in the spray gun winding-up.
2, must inject hot metal mixer to the molten iron in the high retort by the hot metal mixer superior laryngeal aperture, in fact this got rid of the material spray equipment of the arranging possibility of (comprising spray magnesium) above hot metal mixer:
3, exist to generate the active slag of low basicity, low Sulfur capacity in the hot metal mixer, this just makes the effect of desulfurizing iron and possibility descend significantly, even sulphur in the slag also can take place under many circumstances turns back to situation in the molten iron;
4, in fact the equipment and the job engineering of existing hot metal mixer can not control slag condition in the hot metal mixer.
5, the gas flame heating system that adopts on the hot metal mixer has increased from slag and has returned the danger of sulphur to molten iron, has also reduced to adopt and has gone up the possibility of inserting the submerged type refractory lance.
6, frequent inclination hot metal mixer inject blast-melted operation (a working position attitude) and from hot metal mixer to the operation (second position attitude) that the converter hot metal ladle goes out molten iron, got rid of basically adopting on the hot metal mixer and inserted the possibility that blowing device carries out desulfurizing iron.
Also have in addition and a series ofly can not adopt the reason of carrying out desulfurizing iron in little hot metal ladle and the hot metal mixer.The result makes many Steel Plant can not carry out desulfurizing iron at all, and this all has very negative influence to the technico-economical comparison of molten iron-steelmaking and the quality of the steel that produce.
Summary of the invention:
The purpose of this invention is to provide a kind of hot metal mixer interior is the equipment of method with this method of realization of desulfurizing iron with magnesium.For spray magnesium in hot metal mixer carries out desulfurizing iron, change the formation and the technology of the existing working system of hot metal mixer, upkeep operation.Hot metal mixer generally has two working position attitudes.First attitude (seeing accompanying drawing 1)--the aditus laryngis 4 that injects molten iron to hot metal mixer is in vertical position (the A-A axle of hot metal mixer is vertical).Second position attitude (seeing accompanying drawing 3)--hot metal mixer is bowed towards iron notch in the direction of the clock and is inclined, and molten iron is poured into the converter hot metal ladle 18 from hot metal mixer 1; Hot metal mixer is the axial right bank of A-A when this attitude.
In order to implement the method among the present invention, provide the 3rd working position attitude (seeing accompanying drawing 2) for hot metal mixer, hot metal mixer (towards the opposite direction of iron notch) is counterclockwise faced upward and is inclined.When this working position attitude, realize desulfurizing iron: carry out desulfurization by the nozzle 16 winding-up magnesium material that are installed in the furnace wall, mouth of a river fire door 6 opposite of tapping a blast furnace.At this moment sidepiece nozzle (spray gun) is installed in the refractory walls of (being arranged in) hot metal mixer 1.When hot metal mixer was in two common working position attitudes, the outlet of nozzle 16 was higher than bath surface.Blow nitrogen or other non-oxidizing gas by what nozzle 16 did not stop, just brought up the well atmosphere of carrying out sweetening process in the hot metal mixer.Sidepiece nozzle 16 is received on the dispensing mechanism 14 that the magnesium material is housed by material guiding pipe 17, perhaps receives on another dispensing mechanism 15 that other refining agent is housed, and this has just guaranteed the blowing process desulfurization to molten iron.
The processing mode of molten iron is as follows: hot metal mixer is from first working position attitude (accompanying drawing 1) the 3rd working position attitude (accompanying drawing 2) of tumbling, and at this moment sidepiece nozzle 16 (always blowing nitrogen by this nozzle) is flooded by the molten iron melt, and molten iron produces bubbling.At this moment connect material feeder 14 for magnesium, the molten iron target sulphur according to first sulfur content of molten iron and program requirement sprays into the magnesia mixture of specified amount.
For preventing that the sulphur in the slag returns in the molten iron again after the desulfurization, by aditus laryngis 4, from feed bin 8 or feed bin 13 usefulness metering feeder 9 and by means of system 11 and 12 the calcic that blendes together grade contain the magnesium material (such as, the lime of dolomitized, calcined dolomite, lime kilnings etc.) join in the hot metal mixer, the amount of allocating into is 0.02～0.30kg/kg slag.This material in the molten iron converting process with hot metal mixer in original slag fully stir, revised the content of CaO and Mg0 in the slag, thereby improved the suction sulphur ability of slag.
To use in the magnesium sweetening process (accompanying drawing 2) at molten iron, send into nitrogen or reducing gas by air-blast device 5. air-blast device 5 is configured in the iron notch, just has been displaced to top position (seeing accompanying drawing 2) during desulfurization.This method has been proofreaied and correct the atmosphere of hot metal mixer space (top of molten iron and slag melt), the mass exchange process when this helps influencing desulfurizing iron and improve desulfuration efficiency.
After spraying into the magnesia mixture of specified amount, stop hot metal mixer being screwed to the initial first working position attitude (seeing accompanying drawing 1) for magnesium, at this moment sidepiece nozzle 16 exceeds bath surface again, continues to be blown into non-oxidizing gas by nozzle.
In hot metal mixer, give this method and the used equipment of this method of enforcement of desulfurizing iron with magnesium, have the following advantages than other known method:
1, in the time can not using the conventional process molten iron, use this method can reach desired any desulfurization depth;
2, caused magnesium and other sweetening agent good condition of effective utilization, this is because processed molten iron maximum (more than the 300t) and can revise the ability that slag holds sulphur;
3,, thereby improved the utilization ratio of magnesium owing to can adjust the atmosphere of furnace inner space;
4, guaranteed not make high sulphur slag to enter the condition of steel-making unit with molten iron;
5, do not need the big and heavy equipment of metal consumption to manufacture refractory lance and be inserted in the molten iron.
When in addition, adopting this method initial cost economize most, simple to operate, the refining possibility is many, efficient is high, working cost is low, temperature drop and with the minimum advantage of slag iron loss.
Description of drawings:
Fig. 1 is implemented in the equipment-technical process schematic diagram of winding-up magnesium desulphurization method in the hot metal mixer.
Fig. 2 sprays the position attitude of hot metal mixer during magnesium desulfurization principle figure and the desulfurization in hot metal mixer.
Fig. 3 is the slag aditus laryngis schematic diagram and from the position attitude of hot metal mixer hot metal mixer during the converter hot metal ladle is tapped a blast furnace of tapping a blast furnace that blows off.
Among the figure
1-hot metal mixer;
2-molten iron;
3-slag;
4-toward the interior notes iron aditus laryngis of molten iron of hot metal mixer;
5-blowing device;
6-go out the molten iron fire door by what hot metal mixer fell molten iron in the hot metal ladle;
7-take off (removing) slag machine;
8-R1 batch can;
9-dispensing mechanism;
10-weighing device;
11-by batch can 8 and 13 past hot metal mixer mouth feeding systems;
12-displacement disc;
13-R2 batch can;
14-the metering winding-up material feeder of discrete agent (magnesium) is housed;
15-the metering winding-up material feeder of discrete agent R3 is housed;
16-by the nozzle of material feeder 14 and 15 blowing desulfurization agent in the molten iron;
17-past nozzle 16 is sent from the soft section of material conduit of bulk cargo;
18-the iron furnace bag of desulphurised hot metal is housed.
Embodiment
Embodiment 1
Desulfurization in the 600t hot metal mixer.Molten iron actual weight 400t in the stove.The initial sulphur content 0.03% of molten iron, 1300 ℃ of molten iron temperatures.Slag amount is the 8kg/t molten iron.
The magnesium of seedization has been adopted in desulfurization, and carrier gas is the nitrogen that is dried to dew point-40 ℃.The nitrogen consumption is 95Nm during the winding-up
3/ h (is the nozzle winding-up of 11.5mm by diameter).The magnesium unit consumption is the 0.24kg/t molten iron.Handle a stove with 96 kilograms of magnesium amounts.Spray magnesium intensity 8kg/min.The spray magnesium time length is 12 minutes.Dead meal during employing lime is produced is as the addition material of adjusting the slag condition, and consumption is 0.18kg/kg slag (perhaps being expressed as 1.4kg/t iron).Do not see hot metal temperature drop is arranged.The sulphur content of handling in the molten iron of back is 0.009%.Desulfurization degree is 70%.Magnesium utilization efficiency 89% (in the iron-bearing water residual magnesium).There is not slag in the converter hot metal ladle.
Handle molten iron with the 600t hot metal mixer.Weight of molten iron 490t in the stove.The initial sulfur content 0.035% of molten iron.1305 ℃ of molten iron temperatures.Quantity of slag 9kg/t iron in the stove.
The winding-up granular magnesium desulfurization.Carrier gas---dry nitrogen.The nitrogen flow of molten iron surface is 170Nm
3/ h, winding-up magnesium (nozzle diameter 11.5mm).Nitrogen flow 100Nm during this time
3/ h.The magnesium unit consumption is the 0.39kg/t molten iron, handles stove magnesium 147kg.Spray magnesium intensity 9kg/min.The winding-up 16.2 minutes continued time of magnesium.(grade is 5～20mm) to the lime unit consumption of dolomitized---0.17kg/kg slag.Molten iron temperature is 1301 ℃ behind the spray magnesium.Sulphur content is 0.004% behind the desulfurizing iron.Desulfurization degree 88.6%.Magnesium utilization efficiency (residual magnesium in the iron-bearing water) 91%.There is not slag in the converter hot metal ladle.
Send into non-oxidizing gas by nozzle 16 and blowing device 5 slag on molten iron surface in the hot metal mixer is blown displacement.Slag is blown to such an extent that move to the direction of iron notch and stream slag hearth mouth 6 when jet by nozzle 16; 5 of air-blast devices are (to see accompanying drawing 3) the slag stream slag hearth mouth 6 that blows off when hot metal mixer is in the second working position attitude, thereby prevent that slag drops into the converter hot metal ladle 18 when hot metal mixer taps a blast furnace.This latter event is a steel making working procedure, has especially created the favourable condition of utilizing desulphurised hot metal during smelting low-sulfur steel.
Successively use air-blast device 5, nozzle 16 and slag removal machine 7 (to add R with the operation of revising the slag composition more successively from feed bin
1, R
2Material is seen accompanying drawing 1) cooperatively interact, slag condition, the slag condition when using the magnesium desulfurization also can suppress to the not dreggy desulphurised hot metal of steel-making unit supply when making us can control hot metal mixer work flexibly.
There are two factors can guarantee to be blown into non-oxidizing gas reliably or to carry the neutral gas jet of magnesium by the sidepiece nozzle on the hot metal mixer wall.First when nozzle passage diameter≤12mm, reaches very high gas velocity (approaching tripping speed) at nozzle exit one by one easily, and this has just guaranteed the cooling of channel exit and has prevented in the melt admission passage.Second one by one the reliability of nozzle operation can reach double insurance: nozzle 16 is made replaceable and easy replacing.
Among the present invention with hot metal mixer in matching used other devices as take off (removing) slag machine, R1 batch can, dispensing mechanism, weighing device, same as the prior art with 13 toward jet material feeder etc. of hot metal mixer mouth feeding system, displacement disc, R2 batch cans, the metering winding-up material feeder that discrete agent (magnesium) is housed, metering that the agent R3 that disperses is housed by batch can 8.The method that the calculating of hot metal treating agent consumptions such as sweetening agent is adopted is also identical with prior art.
Therefore, the example of this method of quoting (desulfurization of winding-up magnesium is adjusted and revised slag condition in the stove in hot metal mixer, taps a blast furnace to the converter hot metal ladle from hot metal mixer) shows: the present invention can solve desired desulfurizing iron task, comprise dark desulfurization task, and prevented that high sulphur slag from dropping in the converter hot metal ladle.
Claims (1)
1, the method of molten iron desulfuring using magnesium in metal mixer, comprise molten iron is poured in the hot metal mixer, spray magnesium is handled molten iron in hot metal mixer, add various treatment agents in the hot metal mixer and desulphurised hot metal is poured into from hot metal mixer in the converter bag, hot metal mixer (1) can incline towards oppositely facing upward of the fire door that goes out molten iron (6), form the 3rd working position one desulfurization position, be equipped with special-purpose side nozzle (16) on the furnace sidewall on the fire door that goes out molten iron (6) opposite of hot metal mixer (1), the outlet of its nozzle (16) is higher than the liquid level of molten iron (3) when hot metal mixer is in the normal position, this nozzle (16) sprays into non-oxidized gas always, and hot metal mixer (1) is when tumble in the desulfurization position, side nozzle slips into below the molten iron liquid level, to the molten iron spraying desulfurization spraying agent, it is characterized in that: during the blowing desulfurization agent, the gas that sprays into nitrogen or have reducing power with the air-blast device (5) that is positioned on out molten iron fire door (6) top, be used for revising atmosphere and slag condition in the hot metal mixer (1), in order to prevent that sulphur from returning molten iron and slag action furnace lining from slag, add the magniferous material of calcic by annotating iron aditus laryngis (4) to bath surface, add-on is the magniferous material of 0.02～0.30kg calcic/kg slag, in order to revising the composition of slag, side nozzle (16) internal diameter that sprays magnesium through the hot metal mixer sidewall in the molten iron is≤12mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100467594A CN100482809C (en) | 2005-06-27 | 2005-06-27 | Method of molten iron desulfuring using magnesium in metal mixer and equipment for realizing said method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100467594A CN100482809C (en) | 2005-06-27 | 2005-06-27 | Method of molten iron desulfuring using magnesium in metal mixer and equipment for realizing said method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1718756A CN1718756A (en) | 2006-01-11 |
| CN100482809C true CN100482809C (en) | 2009-04-29 |
Family
ID=35930704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100467594A Expired - Fee Related CN100482809C (en) | 2005-06-27 | 2005-06-27 | Method of molten iron desulfuring using magnesium in metal mixer and equipment for realizing said method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100482809C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110982988B (en) * | 2019-12-25 | 2021-08-13 | 河钢股份有限公司承德分公司 | Desulfurization method for promoting contact of steel slag in LF refining furnace and steel-making method |
| CN111440921B (en) * | 2020-04-16 | 2022-01-21 | 河北敬业精密制管有限公司 | High-efficient dephosphorization desulphurization unit of molten iron |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3598383A (en) * | 1969-01-14 | 1971-08-10 | William H Moore | Method and apparatus for incorporating additives in a melt |
-
2005
- 2005-06-27 CN CNB2005100467594A patent/CN100482809C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3598383A (en) * | 1969-01-14 | 1971-08-10 | William H Moore | Method and apparatus for incorporating additives in a melt |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1718756A (en) | 2006-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100695650B1 (en) | Refining agent and refining method | |
| CN100370036C (en) | Slit type ladle bottom blowing powder injection process and apparatus | |
| CN104169442B (en) | The vacuum refining method of molten steel | |
| WO2010072043A1 (en) | Smelting vessel, steel making plant and steel production method | |
| CN104480251B (en) | Pretreatment device for simultaneously desulfurizing, desiliconizing and dephosphorizing molten iron, application and smelting method | |
| CN105525055A (en) | Method for controlling splashing in less slag smelting decarbonization period of converter | |
| JP2012012648A (en) | Method for applying desulfurize-treatment to molten steel | |
| CN107201421B (en) | A kind of production method of super-low sulfur molten steel | |
| CN109371200A (en) | A kind of smelting process making molten iron quick dephosphorization by converter bottom spray iron oxide red | |
| CN105408501B (en) | The dephosphorization treatment method of molten iron | |
| CN1087035C (en) | Technology for pretreating molten iron inshallow smelting bath by blowing Mg-base desulfurizing agent | |
| CN109790590B (en) | Dephosphorization apparatus and dephosphorization method of molten iron using the same | |
| CN100482809C (en) | Method of molten iron desulfuring using magnesium in metal mixer and equipment for realizing said method | |
| JP6816777B2 (en) | Slag forming suppression method and converter refining method | |
| CN86102801A (en) | Technology and equipment with sponge iron steel-making | |
| US4601749A (en) | Method for adjusting chemical composition of molten pig iron tapped from blast furnace | |
| US9187792B2 (en) | Agent for treating molten metals, method for the production and use thereof | |
| JP5904238B2 (en) | Method of dephosphorizing hot metal in converter | |
| JP5967139B2 (en) | Hot metal pretreatment method | |
| CN2811308Y (en) | Hot metal mixer for desulfurization of molten iron | |
| CN1243882A (en) | Low-basicity less-slag iron smelting technology for blast furnace with external desulfurizing greatly of molten iron | |
| CN101921889B (en) | Manufacture method of low-phosphorus molten iron | |
| CN1718757A (en) | Metal mixer for proceeding molten iron desulfuring using magnesium in metal mixer | |
| JPH05222425A (en) | Method for treating desulfurization of molten iron and desulfurized slag by calcium aluminate | |
| JP5338251B2 (en) | Hot phosphorus dephosphorization method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: YINGKOU DSMK TECHNOLOGY DEVELOPMENT CO., LTD. Assignor: Liu Dongye Contract record no.: 2012210000014 Denomination of invention: Method of molten iron desulfuring using magnesium in metal mixer and equipment for realizing said method Granted publication date: 20090429 License type: Exclusive License Open date: 20060111 Record date: 20120301 |
|
| ASS | Succession or assignment of patent right |
Owner name: YINGKOU DSMK TECHNOLOGY DEVELOPMENT CO., LTD. Free format text: FORMER OWNER: LIU DONGYE Effective date: 20131205 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131205 Address after: Air Dashiqiao Steel City Management District Street Liaoning city of Yingkou province in new 115100 Patentee after: YINGKOU DSMK TECHNOLOGY DEVELOPMENT CO., LTD. Address before: 115100 Commercial Bank of Harbin Road, Liaoning, Dashiqiao 920 Patentee before: Liu Dongye |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090429 Termination date: 20160627 |